We are new pool owners, on our 3rd summer. Starting to think about getting serious from the intex with a semi inground install of a 27-30 pool. I am trying to do all the research I can in my (like most of us) very limited spare time. From what I think I have learned a cartridge filter will "filter" finer particals than a sand filter and also I won't waste balanced water backwashing.
What drawbacks am I missing? Why is it every local pools shop (other than 1 big one) is recommending a sand filter?